<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>伪类</title>
    <link rel="stylesheet" href="./css/effective_4.css">
</head>

<body>
<h1>画分割线</h1>
<p class="dead-line">我是有底线的</p>
<h1>巧用伪元素做一些特殊效果</h1>
<!-- <form action="" class=""read-only"> -->
<form action="">
    <label class="read-only">
        <span>ABC:</span>
        <select name="select" id="">
            <option value="a">a</option>
            <option value="b">b</option>
            <option value="c">c</option>
        </select>
    </label>
</form>
</body>

</html>